A main object of the present invention is to provide beneficial improvements relating to a method for producing a fiber reinforced plastic product, the method including curing while pressurizing a prepreg preform by using a core having a fusible part as means for pressurizing. A method for producing a fiber reinforced plastic product, the method including: a core preparation step of preparing a core comprising a fusible part and an outer skin covering the fusible part; a molding step of disposing a prepreg preform inside a mold together with the core, and heating and pressurizing the prepreg preform in the mold to obtain a cured product; and a core removal step of removing materials of the fusible part from the cured product, in the molding step, at least a portion of the prepreg preform being pressurized by expansion of the core, in which the fusible part comprises a first fusible part and a second fusible part having a fusion temperature higher than that of the first fusible part, a material of the first fusible part and a material of the second fusible part are incompatible with each other, and in the molding step, the first fusible part fuses partially or entirely, while the second fusible part does not fuse partially or entirely.

The present invention relates to an ultrahigh sensitive pressure-sensing film based on spiky hollow carbon spheres and the fabrication method thereof. The fabricated spiky hollow carbon spheres composed polydimethylsiloxane sensing film whose spheres were well dispersed in the matrix. The spiky structure is useful for the spheres to trigger Fowler-Nordheim (F-N) tunneling effect and thus enhancing the sensitivity of the material. The carbon material fabricated by the precursor transformation method contains a proper Nitrogen doping, which has efficiently increased the carrier migration ability. The hollow structure can both regulate the density of fillers and help to improve its temperature independence. Calcine the spheres under an inert atmosphere to transform the spiky hollow organic spheres into a carbon one, in this process the Nitrogen fraction and graphitization can be adjusted. The above carbon spheres then can be assembled with polydimethylsiloxane to achieve the composite film. The material of the present invention exhibits ultrahigh sensitivity, high sensing density, transparent, low hysteresis, temperature noninterference, and its processing method is simple, maturity and environment friendly.

The present invention relates to a method for producing a negative skin and a tool. Such a tool can be used, for example, in the automotive industry.

The present invention relates to a method for producing a negative skin and a tool. Such a tool can be used, for example, in the automotive industry.

A mold core for producing a component of fiber composite material with a cavity. The mold core makes a particularly simple and efficient demolding process possible by a mold core extending along a longitudinal axis and which is in the form of a hybrid core and which includes, viewed in a cross section perpendicular to the longitudinal axis, a first core portion and a second core portion, wherein the first core portion is formed from a first material with high stiffness and low coefficient of thermal expansion, and wherein the second core portion is formed from a second material that differs from the first material, and is configured such that, under predetermined conditions, its form changes in a predetermined manner such that removal of the mold core from a cavity in the cured component is made easier.

A method of forming a sandwich structure including at least partially filling an open volume of an open cellular core with a sacrificial mold material, consolidating the sacrificial mold material to form a sacrificial mold, laying up a composite facesheet on each of at least two surfaces of the open cellular core, co-curing the composite facesheets by applying a consolidation temperature and a compaction pressure to the composite facesheets to form the sandwich structure, and removing the sacrificial mold. The compaction pressure is greater than a compressive strength of the open cellular core and less than a combined compressive strength of the open cellular core and the sacrificial mold.

A method for removing a hollow support element (17) from within a moulded part (15) to form a cavity (25) within the moulded part, the hollow support element being disposed within the moulded part and composed of material having a softening temperature, the method comprising: heating a liquid (20) to a temperature at least equal to the softening temperature of the material; injecting the heated liquid into an opening (24) in the moulded part to deform the material; and removing deformed material and liquid from the cavity.

A method for removing a hollow support element (17) from within a moulded part (15) to form a cavity (25) within the moulded part, the hollow support element being disposed within the moulded part and composed of material having a softening temperature, the method comprising: heating a liquid (20) to a temperature at least equal to the softening temperature of the material; injecting the heated liquid into an opening (24) in the moulded part to deform the material; and removing deformed material and liquid from the cavity.

A frame for an opto-mechanical support structure includes an interconnected lattice of frame composite rods defined about an interior space with interstices defined between the frame composite rods. A method of making an opto-mechanical frame includes forming a frame of interconnected lattice of frame composite rods using one or more Automated Fiber Placement (AFP) around a mandrel. The method includes removing the mandrel from an interior space of the frame after forming the frame.

The application relates to a method for producing a hollow support from a fiber composite material, to a core designed as a hollow body, to the use of said core, and to the use of said hollow support made from fiber composite material.